Synthesized answer
The passages explain that Hercule Poirot exonerates all the original suspects in Roger Ackroyd's death [1]. This systematic elimination of obvious culprits, such as Ralph Paton, who had the most to gain from Ackroyd's death, is part of Poirot's strategy [1]. He lays out a reasoned case that the murderer is "someone who had not come under suspicion at all" and whose motive is unrelated to money [1, 4].
The passages do not explicitly explain how the challenge of a locked-room mystery inherently directs attention away from the true murderer. However, they suggest that the focus shifts from those with apparent motives and opportunities to someone entirely unexpected, thereby diverting suspicion. The detail that Roger Ackroyd was found dead in his "locked study" is mentioned, and Poirot's investigation involves scrutinizing discrepancies in witness statements, such as the timing of someone's walk [1, 5].
Synthesized from the book passages below. Chat with the book on Feynman for follow-up.
From the book
ut the police focus on Ralph Paton, Ackroyd's stepson and heir, and the person with the most to gain from Roger's death. When sleuth Hercule Poirot, who is living quietly in King's Abbot, agrees to investigate, the case takes a completely different turn. Poirot exonerates all of the original suspects, and lays out a completely reasoned case that the clever and devious murderer is someone who had not come under suspicion at all - someone whose motive has nothing to do with money.
f do not know who the guilty person is, but that you are sure that he is to be found amongst the people here to-night. Therefore your words were intended to force a confession from the unknown murderer?” Poirot nodded approvingly. “A clever idea, but not the truth.” “I thought, perhaps, that by making him believe you knew, you might force him out into the open—not necessarily by confession. He might try to silence you as he formerly silenced Mr. Ackroyd—before you could act to-morrow morning.” “A trap with myself as the bait! _Merci, mon ami_, but I am not sufficiently heroic…
Roger Ackroyd was a peculiar man over money matters. The girl might be at her wit’s end for a comparatively small sum. Figure to yourself then what happens. She has taken the money, she descends the little staircase. When she is half-way down she hears the chink of glass from the hall. She has not a doubt of what it is—Parker coming to the study. At all costs she must not be found on the stairs—Parker will not forget it, he will think it odd. If the money is missed, Parker is sure to remember having seen her come down those stairs. She has just time to rush down to the…
devious murderer is someone who had not come under suspicion at all - someone whose motive has nothing to do with money. ([source][1]) ---------- Also contained in: - [Five Classic Murder Mysteries](https://openlibrary.org/works/OL471533W) - [Masterpieces of Murder](https://openlibrary.org/works/OL471974W) - [More Stories to Remember: Volume II](https://openlibrary.org/works/OL15146874W) - [The Murder of Roger Ackroyd / The Mystery of the Blue Train / Dumb Witness / Death on the Nile](https://openlibrary.org/works/OL20909872W) - [Murders to die…
me that first drew my attention to you—right at the beginning.” “Discrepancy in time?” I queried, puzzled. “But yes. You will remember that every one agreed—you yourself included—that it took five minutes to walk from the lodge to the house—less if you took the short cut to the terrace. But you left the house at ten minutes to nine—both by your own statement and that of Parker, and yet it was nine o’clock as you passed through the lodge gates. It was a chilly night—not an evening a man would be inclined to dawdle; why had you taken ten minutes to do a five-minutes’ walk? All along…
More questions about this book
- Hercule Poirot's initial mischaracterization as a "hairdresser" rather than a "detective par excellence" reflects a common theme in the novel's plot structure. How does this early deceptive perception foreshadow or parallel the ultimate reveal that the murderer is "someone who had not come under suspicion at all"?
- The narrative highlights numerous suspects with clear financial incentives, yet Poirot concludes the true murderer's motive "has nothing to do with money." How does this subversion of typical crime novel motives force both Poirot and the reader to fundamentally re-evaluate their understanding of culpability and human nature in the story?
- The most startling revelation is that the killer is "someone who had not come under suspicion at all." What narrative techniques or subtle misdirections might Agatha Christie employ to achieve such a surprise, particularly given that the reader often accompanies the detective through the investigation?
- The story begins with Mrs. Ferrars' suicide and a web of "rumors" (blackmail, secret lover) that immediately precede Ackroyd's murder. How might these initial, seemingly peripheral events and their associated "rumors" be fundamentally linked to the eventual, non-monetary motive of the unexpected killer, creating a tightly woven plot?